* {
    margin: 0px;
    padding: 0px;
    list-style: none;
}

img {
    width: 1200px;
    height:400px;
}

.main {
    width:1200px;
    height:400px;
    margin:50px auto;
    position:relative;
    background-color:#f60;
    box-shadow: 0 0 10px #CCC;
}

.main .picShow li{
    position: absolute;
    top:0;
    left:0;
    display:none;
}

.main .number{
    position:absolute;
    bottom:20px;
    left:0;
    font-size:0;
    margin:0 auto;
    width:100%;
    text-align: center;
}

.main .number li{
    width:10px;
    height:10px;
    line-height: 20px;
    color:#fff;
    text-align: center;
    font-size:20px;
    display:inline-block;
    background-color:#333;
    border-radius:50%;
    margin:0 5px;
    cursor:pointer;
}

.number li.active{
    box-shadow: 0 0 5px #ff6600;
    background-color:#fff;
}

.main .btn{
    width:30px;
    height:60px;
    font-size:20px;
    line-height: 60px;
    color:#fff;
    text-align:center;
    background:rgba(0,0,0,0.3);
    position:absolute;
    top:50%;
    margin-top:-30px;
    cursor:pointer;
}

.main .left{
     left:0;
 }

.main .right{
    right:0;
}